EP0813218B1 - Auslöse-Einrichtung für ein Überstrom-Abschaltgerät - Google Patents

Auslöse-Einrichtung für ein Überstrom-Abschaltgerät Download PDF

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Publication number
EP0813218B1
EP0813218B1 EP97890097A EP97890097A EP0813218B1 EP 0813218 B1 EP0813218 B1 EP 0813218B1 EP 97890097 A EP97890097 A EP 97890097A EP 97890097 A EP97890097 A EP 97890097A EP 0813218 B1 EP0813218 B1 EP 0813218B1
Authority
EP
European Patent Office
Prior art keywords
armature
trip device
holding force
tripping
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97890097A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0813218A3 (de
EP0813218A2 (de
Inventor
Tibor Dipl.-Ing.Dr Polgar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felten and Guilleaume Austria AG
Original Assignee
Felten and Guilleaume Austria AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Felten and Guilleaume Austria AG filed Critical Felten and Guilleaume Austria AG
Priority to AT97890097T priority Critical patent/ATE297052T1/de
Publication of EP0813218A2 publication Critical patent/EP0813218A2/de
Publication of EP0813218A3 publication Critical patent/EP0813218A3/de
Application granted granted Critical
Publication of EP0813218B1 publication Critical patent/EP0813218B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/26—Electromagnetic mechanisms with windings acting in opposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part

Definitions

  • the invention relates to a tripping device for an overcurrent breaking device, such as e.g. Circuit breaker comprising a switch-actuated tripping armature, which can be actuated by a coil through which a current to be monitored flows, wherein the trigger armature indirectly by means of at least one elastic Coupling link and optionally one or more auxiliary anchors with the trip anchor connected, can be actuated by the coil directly movable magnetic armature.
  • overcurrent shutdown devices are essentially on the one hand fuses-they are only usable for a single shutdown and on the other re-activatable, therefore repeatedly usable circuit breaker in use.
  • this selectivity is due to the melting of the Melting wire required heating power, which is proportional to the square of the amperage and the duration of action of the overcurrent is determined.
  • thermo-bimetallic strip which bimetallic strip is analogous to the enamel wires proportional to the square of Current and time deform and delayed by this deformation the Enable switching operation of the short-circuit current tripping.
  • bimetallic strips represent components that are mechanically precisely adjusted on the one hand and on the other hand require additional electrical connections. In summary So they bring a significant complication of the circuit breaker construction and thus a Deterioration of functional reliability and a more complicated production with it.
  • DE-C-438 518 shows a trigger of an overcurrent relay comprising a coil and an armature movable therefrom. Furthermore, a displaceable rod is provided, which is coupled to the armature via a helical compression spring. On the rod acts a timer, which allows a slow movement of the rod.
  • GB-PS-522 303 corresponds in function and structure substantially to DE-C-438 518 :
  • the object of the invention is a triggering device of the type mentioned which has a selective triggering behavior, but only a few few, insensitive and easy to install to the conventional trip coil Has to be added components.
  • Circuit breaker comprising a switch-actuated tripping armature, which can be actuated by a coil through which a current to be monitored flows, the object is achieved in that the release anchor only in his Rest position is held with a predetermined holding force, and after exceeding this holding force starts moving suddenly.
  • the holding force on force generated by mechanical means resulting in a robust and compact design of the triggering device according to the invention leads.
  • the holding force is a static friction force which is producible by components in contact with the triggering armature.
  • the Holding force by acting on the trigger armature resilient components such. a Snap spring is generated.
  • the Holding force a magnetic, by at least one acting on the trigger anchor Permanent or electromagnet generated force.
  • the holding force acting on the release armature changeable is because so the time delay of the triggering process changeable and with a switching device according to the invention provided switching device on him downstream protective devices is adjustable.
  • the Holding force is variable depending on the strength of the monitored current.
  • the triggering device can be realized; depending on the size of the Short-circuit current increases the relative switch-off delay automatically.
  • the holding force of a Electromagnet which is directly proportional to the current to be monitored Electricity is flowing, can be generated.
  • Another feature of the invention may be that the at least one elastic Coupling member is formed by a coil spring, because such components have little space but at the same time have good and constant elasticity.
  • the magnetic armature is at least partially disposed in the interior of the coil.
  • the magnetic anchor is exactly predictable by the magnetic forces of the current to be monitored.
  • the Trigger armature is located inside the coil, the release armature is not off magnetizable material is formed.
  • the magnet armature as unilaterally closed pipe section is formed and that the triggering armature and the at least one coupling member at least are partially disposed within the cavity formed by the magnet armature.
  • the release anchor a passing through the magnet armature, preferably parallel to the longitudinal axis of the Coil extending approach has on which approach the holding force acts.
  • the holding force introducing components can be arranged outside of the coil be so that they are arranged in the interior of the coil components in their Do not obstruct freedom of movement in any way.
  • the tripping device for an overcurrent disconnecting device shown in Fig. 1, e.g. Circuit breaker, has a magnetic armature 5 consisting of a magnetizable Material such as iron, which magnetic armature 5 of a coil. 3 is directly movable.
  • the current flowing through the coil 3 is the to be monitored and optionally off current itself.
  • a trip anchor 1 provided, which can operate a switching mechanism 20, which 20 switching mechanism to from monitoring current flowing through contacts 21 opens.
  • This operation can be as in the drawing shown on an integrally formed on the trigger anchor 1 trigger pin. 2 take place, alternatively, however, also carried out directly from the release anchor 1 itself become.
  • release armature 1 and magnetic armature 5 are connected to each other by an elastic coupling member 4, which is formed in the simplest case by a coil spring.
  • the release armature 1 is not freely movable, but held with a predetermined holding force F H in its rest position.
  • a return spring 6 is provided, which is supported on the one hand on the release armature 1 and the other on a-only symbolically represented-housing part 7.
  • Said triggering can be divided into two trigger phases, which are described below.
  • a first the occurrence of the overcurrent immediately following the tripping phase, the overcurrent generated via the coil 3 a magnetic field proportional to its strength, which moves the magnetic armature 5 in the direction of the tripping armature 1.
  • This movement is transmitted via the elastic coupling member 4 on the release armature 1, which, however, provisionally still-due to the holding force F H acting on it remains - in its rest position.
  • the coupling member 4 is biased more and more, whereby the force acting on the trigger armature 1 increases.
  • magnetic armature 5 and coupling member 4 represent a vibration system which is energized by the magnetic force generated by the overcurrent.
  • the time required by the magnetic armature 5 to bias the coupling member until the holding force F H is exceeded and the trigger armature 1 is deflected from its rest position results in the time delay, the selectivity of the tripping device according to the invention.
  • the second tripping phase occurs.
  • the release armature 1 comes suddenly in motion, whereby the switching mechanism 20 is actuated and subsequently the contacts 21 of the overcurrent protection device are opened.
  • the now coupled masses of magnet 5 and tripping armature 1, in cooperation with the return spring 6, constitute the oscillation system.
  • the triggering is summarized so not by a direct through the overcurrent actuated armature initiated, but takes place indirectly by the movement of the means of elastic coupling member 4 connected to the trigger armature 1, from the coil. 3 directly movable magnetic armature 5.
  • the time delay of the triggering is essentially in the first triggering phase created. It is characterized by the mechanical properties of the vibration system -Magnet anchor mass, Spring rate of the coupling member 4 and Magnet Ankerhub- and through the Current determined.
  • the current force is known to be proportional to the square of the current, Consequently, the movement of the magnetic armature 5.
  • the delay to Current square proportional just as in the aforementioned known, electrothermal functioning delay devices.
  • auxiliary armature 11 to be arranged between the magnet 5 and the tripping armature 1.
  • these auxiliary anchors 11 are mechanically connected via further elastic coupling members 40 and are acted upon analogously to the release anchor 1 in their rest positions with holding forces F H.
  • Such a mechanical series connection of several anchors leads to an addition of their holding forces F H as well as to an enlargement of the deflection path to be traveled by the magnet armature 5 and thus to an extension of the delay time.
  • FIGS. 3a and 3b show examples of the holding force generation by mechanical means.
  • the holding force F H is a static friction force, which is produced by standing in contact with the trigger armature 1 components 8, which pinch the trigger armature 1 between them.
  • the alternative according to FIG. 3 b provides for the holding force F H to be generated by resilient components 9, such as a snap spring, acting on the release armature 1.
  • This snap spring 9 is designed as a clamped on both sides and biased against the direction of movement of the trigger armature 1 leaf spring. If the force acting on it is large enough, it bends against its biasing direction, allowing movement of the trigger armature 1.
  • holding force F H is a magnetic force generated by at least one acting on the tripping armature 1 permanent or electromagnet force. Examples of these are shown in FIGS. 4, 5 and 6. These drawings illustrate practical embodiments of the invention.
  • the coil 3 is arranged on a non-magnetic winding body 10, wherein the Magnetic armature 5 is arranged in sections inside the coil 3. Furthermore, there is a yoke 23 provided of magnetizable material, the majority outside the coil. 3 runs and has a projection 24, which is closer to the switching mechanism 20 located at the end of Spool 3 protrudes into this.
  • the magnetic field generated by a coil current closes via the yoke 23, the magnet armature 5, the working air gap a and the yoke 24.
  • This structure corresponds to the conventional, conventional design of a Magnetic release.
  • the trigger armature 1 is disposed inside the coil 3, must however, of non-magnetizable material, e.g. Aluminum or plastic be formed so that it is not moved by the magnetic forces generated by the coil 3 becomes.
  • the magnet armature 5 is formed as a closed side pipe section, wherein the Tripping armature 1 and the coupling member 4 within the magnetic anchor 5 formed Cavity are arranged.
  • the release armature 1 has a release pin 2 extending out of the coil 3 and is analogous to the illustration of Figure 1 by a return spring 6 in its rest position brought.
  • this one has passing through the magnet armature 5, preferably parallel to the longitudinal axis of the Coil 3 extending approach 12. This has freely accessible and therefore with forces loadable sections.
  • the approach 12 is not mandatory to provide, within the meaning of the invention, it is equally possible to let the holding forces F H act directly on the trip anchor 1.
  • the components required for this would have to be arranged in the interior of the coil 3, if appropriate recesses for them in the magnetic armature 5 are provided, so that it is not hindered in its freedom of movement.
  • the holding force F H in this embodiment is generated by magnetic means, specifically by means of a permanent magnet 13.
  • an anchor 26 is set at the upper end of the neck 12. Together with the yoke 25, which simultaneously serves as a mechanical support for the permanent magnet 13 according to Figure 4, and the permanent magnet 13, the armature 26 forms a magnetic circuit for the magnetic field generated by the permanent magnet 13.
  • the distance d between magnet 5 and release armature 1 may be smaller than the distance a between magnet armature 5 and Jochansatz 24, so that is ensured that at the end of the possible path of movement of Magnetic anchor 5 -er then meets the yoke approach 24 on the release anchor 1, the switch lock 20 has pressed.
  • Figure 5 is consistent with that of Figure 4 largely the same, but here is the permanent magnet 13 by an electromagnet - formed from winding 15 and yoke 25- replaced.
  • the permanent magnet 13 by an electromagnet - formed from winding 15 and yoke 25- replaced.
  • 12th connected armature 26 is provided which forms a magnetic circuit with the yoke 25.
  • a separate component 14 is provided for the mechanical support of the electromagnet.
  • a separate component 14 is provided for the Dimensioning of the distances is what is said in the description of Fig.4.
  • the change in the holding force F H can also be done here again on the adjustment of the lengths of the air gaps 27,28. It is particularly advantageous not to provide the air gaps 27, so the armature 26 to rest on the yoke 25 and to make the inside of the winding 15 extending portion 25 'of the yoke 25 in the longitudinal direction of the winding 15 slidably. Thus, the holding force F H can be adjusted by mechanical means.
  • the holding force F H can also be changed by changing the current flowing through the winding 15.
  • the variability of the holding force F H is by no means limited to magnetic force generation.
  • components 8 may be slidably disposed whereby the contact pressure on the release armature 1 and thus the holding force F H can be changed.
  • the holding force F H is variable as a function of the strength of the current to be monitored.
  • this can be realized in a particularly simple manner by virtue of the fact that the current flowing through the winding 15 is directly proportional to the current to be monitored.
  • the mentioned proportionality is most easily achieved in that the overcurrent itself flows through the winding 15 of the electromagnet.
  • the coil 3 and the winding 15 are connected in series with one another.
  • coil 3 and winding 15 could, however, also be connected in parallel -Vgl. dashed connecting lines 18, 19;
  • 15 series impedances can be switched in branch of the winding to adjust the current flowing through the winding 15 and thus the generated holding force F H.
  • a preferred field of application of the described triggering device according to the invention is in use in circuit breakers, but this is the application in other, over-current disconnecting devices should not exclude.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electromagnets (AREA)
EP97890097A 1996-06-14 1997-05-30 Auslöse-Einrichtung für ein Überstrom-Abschaltgerät Expired - Lifetime EP0813218B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT97890097T ATE297052T1 (de) 1996-06-14 1997-05-30 Auslöse-einrichtung für ein überstrom- abschaltgerät

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0105096A AT405113B (de) 1996-06-14 1996-06-14 Auslöse-einrichtung für ein überstrom-abschaltgerät
AT105096 1996-06-14
AT1050/96 1996-06-14

Publications (3)

Publication Number Publication Date
EP0813218A2 EP0813218A2 (de) 1997-12-17
EP0813218A3 EP0813218A3 (de) 1998-06-17
EP0813218B1 true EP0813218B1 (de) 2005-06-01

Family

ID=3505507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97890097A Expired - Lifetime EP0813218B1 (de) 1996-06-14 1997-05-30 Auslöse-Einrichtung für ein Überstrom-Abschaltgerät

Country Status (11)

Country Link
EP (1) EP0813218B1 (enrdf_load_stackoverflow)
CN (1) CN1163930C (enrdf_load_stackoverflow)
AR (1) AR007579A1 (enrdf_load_stackoverflow)
AT (2) AT405113B (enrdf_load_stackoverflow)
AU (1) AU714838B2 (enrdf_load_stackoverflow)
DE (1) DE59712329D1 (enrdf_load_stackoverflow)
ES (1) ES2112237T3 (enrdf_load_stackoverflow)
GR (1) GR980300005T1 (enrdf_load_stackoverflow)
IN (1) IN191123B (enrdf_load_stackoverflow)
SG (1) SG75118A1 (enrdf_load_stackoverflow)
TN (1) TNSN97104A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19845476B4 (de) * 1998-10-02 2004-08-12 Aeg Niederspannungstechnik Gmbh & Co Kg Magnetsystem für Leitungsschutzschalter
KR100876412B1 (ko) * 2007-07-12 2008-12-31 엘에스산전 주식회사 차단기의 지연시간 출력장치
DE102008030822A1 (de) * 2008-06-30 2010-01-07 Robert Seuffer Gmbh & Co. Kg Schaltvorrichtung mit Auslöseeinrichtung
DE102010041728B4 (de) * 2010-09-30 2014-08-21 Siemens Aktiengesellschaft Magneto-mechanischer Aktor, Schaltanordnung und Verfahren zum Betrieb eines magneto-mechanischen Aktors
US8729984B2 (en) * 2011-06-06 2014-05-20 Rockwell Automation Technologies, Inc. Magnetic actuator with more than one air gap in series
DE102015214966A1 (de) 2015-08-05 2017-02-09 Ellenberger & Poensgen Gmbh Schutzschalter
CN105513916B (zh) * 2016-01-21 2018-06-29 首瑞（天津）电气设备有限公司 用在断路器中的延时动作机构、和断路器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189617A (en) * 1921-10-21 1922-12-07 Electric Construction Co Overload trip retarding or delaying device for electric circuit breakers or automatic switches
DE438518C (de) * 1925-12-01 1926-12-16 Aeg Zeitrelais, insbesondere fuer UEberstromrelais
GB522303A (en) * 1939-06-08 1940-06-14 Gordon Spencer Marston Improvements in or relating to tripping devices for electric circuit breakers and switches
DE2348613C2 (de) * 1973-09-27 1975-11-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Selbstschalter, insbesondere Schutzschalter
DE2951900A1 (de) * 1979-12-21 1981-07-02 Brown, Boveri & Cie Ag, 6800 Mannheim Ausloeser fuer fehlerstromschutzschalter
DE9115607U1 (de) * 1991-12-17 1992-02-13 ABB Patent GmbH, 6800 Mannheim Leitungsschutzschalter

Also Published As

Publication number Publication date
CN1169583A (zh) 1998-01-07
ES2112237T3 (es) 2005-10-16
SG75118A1 (en) 2000-09-19
ATE297052T1 (de) 2005-06-15
AR007579A1 (es) 1999-11-10
AT405113B (de) 1999-05-25
AU2373197A (en) 1997-12-18
EP0813218A3 (de) 1998-06-17
HK1003401A1 (en) 1998-10-30
ES2112237T1 (es) 1998-04-01
TNSN97104A1 (fr) 1999-12-31
IN191123B (enrdf_load_stackoverflow) 2003-09-27
CN1163930C (zh) 2004-08-25
DE59712329D1 (de) 2005-07-07
ATA105096A (de) 1998-09-15
EP0813218A2 (de) 1997-12-17
GR980300005T1 (en) 1998-02-27
AU714838B2 (en) 2000-01-13

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